Shield for grinding or polishing machines



L.-J. SEVISON.

(No Model.)

SHIELD FOB GRINDING 0R POLISHING MAOEINBS.

Patented Jan. 4,1898.

UNITED STATES PATENT @rrrcn.

LUTHER J. SEVISON, OF CONSTANTINE, MICHIGAN.

SHIELD FOR GRINDING O R POLISHING MACHINES.

SPECIFICATION forming part of Letters Patent No. 596,762, dated January4, 1 898. Application filed February 26, 1897. Serial lie. 625,227. (Nomodel.)

To all whom it may concern.-

Be it known that I, LUTHER J. SEVISON, a citizen of the United States,residing at Gonstantine, in the county of St. Joseph and State ofMichigan, have invented certain new and useful Improvements in Shieldsfor Grinding or Polishing Machines, of which the following is aspecification, reference being had therein to the accompanying drawings.

My invention is an attachment adapted to be applied to grinding orpolishing machines of any description to shield or screen the operatorthereof from the fine particles and dust that arise from the same whenin operation.

To this end. the invention includes a transparent guard or shieldinterposed between the head of the operator and the grinding orpolishing surface, whereby the dust arising therefrom will be arrestedand prevented from reaching the eyes and the lungs through inhalation bythe operator.

The invention includes also means for adj ustably holding the guard orshield and the details of construction, as will be hereinafterdescribed, and particularly pointed out in the claims.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a side elevation of the device; Fig. 2, a plan view thereof,and Fig. 3 a detail view.

In Fig. 1 an ordinary grinding or polishing wheel 1 is shown inconnection with a portion of the ordinary supporting-frame. To one edgeof this frame a vertical rod 2 is secured by means of a clamp 3, carriedon the lower end of this rod and extending laterally therefrom. Anarm 3has a pair of laterally-extending Wire loops 4, rigidly secured theretoby brazing or otherwise, these loops being spaced a distance apart. Oneend of the arm is extended through one of the loops and is adjustablysecured to the rod 2 at right angles thereto by means of a clamp 5,which comprises two oblong plates 5 5 having their narrower edges turneddown to form flanges 6. The plates are crossed and the flanges on oneplate are turned toward the opposing plate and extended parallel withthe longer sides of the same. In the edge of the flanges of the plate 5,near the upper longitudinal edge of said plate, semicircular notches 7are out, the

notches in both flanges of the plate 5 being in alinement and formingseats for the arm 3. Similar notches 8 are cut in the flanges of theplate 5 near the longitudinal edge of said plate farthest removed fromthe notches 7. The arm is held in place in the notches 7 by the plate 5which bears thereon, and the rod 2 is held Within the notches S by theplate 5. Thgarm 3 and the rod 2 cross each other in the upper part ofthe space between said plates, and to hold the plates together totightly clamp the rod and arm a binding screw 9 extends through anopening in the lower part of the plate into and through an aliningthreaded opening in the plate 5'. The shank of the bolt extends throughthat part of the space between said plates diametrically opposite tothat occupied by the crossing of the arm and rod, and said shank isprovided with a head 9 and a nut 9 To adjust the arm on the rod or torotate the arm, the nut 9 is loosened and then tightened again, when theproperadjustment is secured. Are'ctangular pane of transparent material10, prefl erably of glass or mica, is heldnear its side edges in theloops 4.

To maintain a yielding pressure on the pane to securely hold the samewithin the loops, the Wires may be. entirely or partly covered by rubberor other flexible tubing 11. The arm 2 being rotatable Within the clampthe pane may be adjusted to any desired inclination in relation to thegrinding-surface. The pane being interposed directly between the head ofthe operator and the grindingsurface, all the particles of dust andinjurious matter arising from the said surface will be interceptedbefore it reaches the eyes or the lungs throughinhalation of theoperator, and these organs are thus shielded from the deleteriouseffects of such dust, dsc.

v The efficiency of the operator is not impaired by the shield, as thepane being transparent does not of course obscure the Work.

I claim-- 1. The combination With a grinding or polishing machine of avertical rod secured thereto, and a dust-shield adjustable thereon, saidshield having an independent adjustment in a horizontal plane,substantially as described.

2. In combination, the rod, the lateral arm secured thereto, the loopscarried by said arm, and the pane held in said loops, substantially asdescribed.

3. In combination, the rod, the arm vertically adjustable thereon andadapted to be rotated, the loops projecting laterally from said arm andfixed thereto, and the pane, sub stantially as described.

4. In combination, the rod, the arm, the loops extending therefrom, thepane and the yielding means carried by the loops for holding said pane,substantially as described.

5. In combination, the rod the arm extending laterally therefrom, the'wire loops extending laterally from said arm and rigidly securedthereto, the yielding tubing fitted to said arm, and the pane heldWithin said loops, substantially as described.

6. Incombination, the rod, the arm carrying the shield and the clamp forsecuring said arm to said rod, said clamp comprising theoppositely-arranged plates adj ustablysecured together with said rod andarm between their opposing faces, substantially as described.

7. In combination the vertical rod, the horizontal arm, the pane carriedthereby, and the clamp for holding the arm to said rod comprising theoblong plates having lateral flanges, the plates being placed face toface with the flanges in one plate extending parallel with thelongitudinal edges of the opposing plates, the flange of each platehaving alining notches in their edges forming seats for the arm and rodand the means for bold ing the plates together, substantially asdescribed.

8. In combination the arm carrying the pane, the rod and the clamp foradjustably securing the arm to said rod and for permitting theindependent rotary movement of said arm comprising the pair of oblongplates 5, 5 having lateral flanges along their narrower edges, saidplates being placed face to face in crossed position whereby the flangeson one plate will extend parallel to the flanges on the opposite plate,the flanges of the plate 5 having notches therein near its upper edge toform seats for the arm, the flanges of the plate 5 having notches in itsedge farthest removed from the notches in the plate 5 to form seats forthe rod, said rod and arm crossing in the upper part of the spacebetween said plates and a binding-screw for clamping said platestogether having its shank extending in the space between said platesdiametrically opposite to that occupied by the crossing of the arm androd, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

LUTHER J. SEVISON.

WVitnesses:

LEVI T. HULL, HENRY B. HULL.

